Tangerine was filmed with the iPhone 5s, but its cinematic feel comes from an app, a lens adapter and several hours of post-production work. Photo: Sean Baker

There was the buzz going into Sundance and the applause of satisfied audiences at the end of the movie’s screening. But there was also a collective gasp as the last line of the credits rolled past.

Shot on the iPhone 5s.

Sean Baker’s Tangerine, the story of two transgender sex workers in Hollywood, was a break-out hit at the renowned film festival in January. The Hollywood Reporter said the film stands out as “crisp and vigorously cinematic.”

Oft-praised for the rich fringe characters in his independent films, Baker did not set out to change the filmmaking landscape by shooting with a cellphone. Like most indie filmmakers, he had no money.

Tangerine has been a breakout hit at this year’s Sundance Film Festival. The indie flick is drawing crowds thanks to a plot that features transgender prostitutes, Hollywood, meth addicts, pimps, and beat cops. But the craziest thing about director Sean Baker’s film is that instead of using a professional camera rig, he shot it all on the iPhone 5s.